Transparent display device

ABSTRACT

A transparent display device includes a first pixel electrode, a second pixel electrode, a first transparent region and at least two metal lines. The second pixel electrode is disposed adjacent to the first pixel electrode. The first transparent region is disposed adjacent to the first pixel electrode. The at least two metal lines are disposed between the first pixel electrode and the second pixel electrode.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of and claims thepriority benefit of a prior application Ser. No. 16/698,954, filed onNov. 28, 2019, now allowed. The entirety of the above-mentioned patentapplication is hereby incorporated by reference herein and made a partof this specification.

BACKGROUND 1. Field of the Disclosure

The disclosure is related to display device, and particularly related totransparent display device.

2. Description of Related Art

In operation of the transparent display device, an image may be normallydisplayed to a user by the transparent display device. However, thetransparent display device contains a transparent part and then theambient background of the transparent display device may still be seenby the user. The transparent display device in design includes atransparent part to allow the light of background to transmit through atthe same time, so that the user may see both the image and thebackground scene at the same time. In this situation, a portion of thebackground scene behind the transparent display device may not beblocked by the transparent display device.

To control the pixels, the transparent display device still needs datalines and gate lines control the pixels to display the image. The lightfrom background would transmit through the transparent part, which isconventionally implemented in each pixel. When the pixel size isreduced, the light from background may be diffracted by the data linesand gate lines or even the black matrix. As a result, the visual imagethrough the transparent part may get blur caused by diffraction.

Reducing the blur effect of the transparent display device is at leastone of the factors to be improved as the development of the transparentdisplay device is continuously proceed.

SUMMARY

The disclosure provides a transparent display device, in which thetransparent part is implemented to reduce the diffraction effect. In anembodiment, the disclosure provides a transparent display deviceincluding a first pixel electrode and a second pixel electrode disposedadjacent to the first pixel electrode; a first transparent regiondisposed adjacent to the first pixel electrode; and at least two metallines. The at least two metal lines are disposed between the first pixelelectrode and the second pixel electrode.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the disclosure, and are incorporated in and constitutea part of this specification. The drawings illustrate embodiments of thedisclosure and, together with the description, serve to explain theprinciples of the disclosure.

FIG. 1 is a drawing, schematically illustrating a basic pixel structureof a transparent display device.

FIG. 2 is a drawing, schematically illustrating the transparent regionin a pixel array of a transparent display device, according to anembodiment of the disclosure.

FIG. 3 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 2, according to an embodimentof the disclosure.

FIG. 4 is a drawing, schematically illustrating a diffraction effect,according to an embodiment of the disclosure.

FIG. 5 is a drawing, schematically illustrating the transparent regionin a pixel array of a transparent display device, according to anembodiment of the disclosure.

FIG. 6 is a drawing, schematically illustrating the transparent regionwith another transparent region in a pixel array of a transparentdisplay device, according to an embodiment of the disclosure.

FIG. 7 is a drawing, schematically illustrating a diffraction effect,according to an embodiment of the disclosure.

FIG. 8 is a drawing, schematically illustrating the first region and thepixel region are arranged alternately along the direction D1 and thedirection D2 in a pixel array of a transparent display device, accordingto an embodiment of the disclosure.

FIG. 9 is a drawing, schematically illustrating the transparent regionwith another transparent region in a pixel array of a transparentdisplay device, according to an embodiment of the disclosure.

FIG. 10 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 9, according to an embodimentof the disclosure.

FIG. 11A and FIG. 11B are drawings, schematically illustrating thetransparent region with another transparent region in a pixel array of atransparent display device, according to an embodiment of thedisclosure.

FIG. 12 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 11A and FIG. 11B, according toan embodiment of the disclosure.

FIG. 13 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 11 A and FIG. 11B, according toan embodiment of the disclosure.

FIG. 14 is a drawing, schematically illustrating the transparent regionwith another transparent region in a pixel array of a transparentdisplay device, according to an embodiment of the disclosure.

FIG. 15 is a drawing, schematically illustrating the transparent regionwith another transparent region in a pixel array of a transparentdisplay device, according to a variant embodiment of the FIG. 14 of thedisclosure.

DESCRIPTION OF THE EMBODIMENTS

The disclosure is related to a transparent display device, in which thetransparent region is provided to at least reducing the visual effectcaused by diffraction from non-transparent parts in the pixel array,such data lines or gate lines, or even the black matrix.

Several embodiments are provided as the disclosure, but the disclosureis not just limited to the embodiments. In addition, the disclosure alsoallows a suitable combination between the embodiments as provided. Inaddition, the expressions “an element overlying another element”, “anelement is disposed above another element”, “an element is disposed onanother element” and “an element is disposed over another element” mayindicate that the element is in direct contact with the other element,or that the element is not in direct contact with the other element,there being one or more intermediate elements disposed between theelement and the other element.

It should be understood that, although the terms first, second, thirdetc. may be used herein to describe various elements, components,regions, layers, portions and/or sections, these elements, components,regions, layers, portions and/or sections should not be limited by theseterms. These terms are only used to distinguish one element, component,region, layer, portion or section from another element, component,region, layer or section. Thus, a first element, component, region,layer, portion or section discussed below could be termed a secondelement, component, region, layer, portion or section without departingfrom the teachings of the present disclosure.

FIG. 1 is a drawing, schematically illustrating a basic pixel structureof a transparent display device. The disclosure has firstly looked intothe basic pixel structure of a transparent display device. Referring toFIG. 1, a basic pixel structure of a transparent display device in anexample may include a pixel region 100 and a transparent region 104. Apixel region 100 may include a sub-pixel comprising a data line 50 and agate line 52, a transistor 56, a color filter 57 and a pixel electrode102. In some embodiment, the pixel region can comprise at least threesub pixels. In addition, the transparent device further comprises ablack matrix 54 may dispose over the data line 50, the gate line 52, ortransistor 56. Generally as an example, the data line 50 and the gateline 52 may define a region, including a pixel region 100 and atransparent region 104.

In some embodiment, the transparent region is defined by the data line50, gate line and black matrix 54 without the pixel region 100.Generally, a transparent display device may further include a backlightsource. The backlight source may be light-emitting diode (LED) in anexample. In some embodiments, the light-emitting diode in an example mayinclude organic light-emitting diode (OLED), quantum dot light-emittingdiode (QLED), mini light-emitting diode (mini LED) or microlight-emitting diodes (micro LED), but not just limited thereto. Thetransparent display device may include a plurality of the basic pixelstructures 1, in which a the color filters 57 in the basic pixelstructures 1 may be red, green or blue. In further embodiments, thecolor filters 57 may be same color. However, the disclosure is not justlimited to the embodiments.

The transparent region 104 in the transparent display device allows thelight from background to pass through. As a result, a user may see boththe image as displayed and a portion of the background behind thetransparent display device.

The structure of the transparent region 104 would determine the qualityof the background scene as seen. The issue about the transparent region104 should be looked into. Then, the blur effect of the background scenemay be reduced by modifying the configuration of the transparent region.

In considering the performance of the transparent display device, adiffraction effect in viewing the background needs to be concerned. Thediffraction effect may be large in conventional structure, causingnon-negligible blur effect.

FIG. 2 is a drawing, schematically illustrating the transparent regionin a pixel array of a transparent display device, according to anembodiment of the disclosure. Referring to FIG. 2, as to the region 150,the pixel region 152 with the two transparent regions 154, 156 arearranged along the direction D1, as indicated by dashed line. The pixelregion 152 may include three sub-pixels 152 a, 152 b, 152 c, which isdisposed between the transparent region 154 and another transparentregion 156. The drawing in FIG. 2 is a top view of the color filtersubstrate in which a structure part 60, may include thin film transistorand other actual elements disposed on the TFT substrate, but is notshown in the present schematic diagram. As also noted, the thin filmtransistor and the color filter 62 may be at the same side or differentside of the device substrate. A region 150 in an embodiment referring tothe pixel region 152 and the two transparent regions 154, 156, asindicated by dashed line, is taken for description. A pitch A betweenthe transparent region 154 and the transparent region 156 in anembodiment may be a minimum distance from a center point of thetransparent region 154 to a center point of the transparent region 156along the direction D1. In an embodiment, the sub-pixel 152 a, 152 b,152 c may have a first width w1 along the direction D1. The transparentregion 154 and the transparent region 156 may have the second width w2along the direction D1. FIG. 5 would further describe the first width w1and the second width w2. Alternatively, a pitch A between thetransparent region 154 and the transparent region 156 in an embodimentmay be a distance from a reference point at an edge such as the upperedge of the transparent region 154 to a same reference point at an edgesuch as the upper edge of the transparent region 156 along the directionD1. The pitch A between the transparent region 154 and the transparentregion 156 is increased in the disclosure. The black matrix 54 may coverthe data line, the gate line, and the thin film transistor. However, insome embodiment, the implementation of black matrix 54 may partiallycover over a portion of the device elements of gate line, data line,driving transistor, pixel electrode, and so on without specificlimitation.

The black matrix 54 may selectively arrange or not arrange according tothe requirement. The disclosure may increase the pitch A between theadjacent two transparent regions 154 and 156 to reduce the interferenceand improve display quality. In addition, the disclosure is not limitedto the implementation of the black matrix 54 as described.

The forgoing disclosure of embodiments is based on the drawing as anexample.

However, the disclosures in the other embodiments and drawings with thefeatures described above may also fall into the protection scope of theforgoing disclosure.

FIG. 3 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 2, according to an embodimentof the disclosure. Referring to FIG. 3, just a portion of the blackmatrix 54 is shown to optionally cover the device element, such as thegate lines 52. In an embodiment, two adjacent gate lines 52 are coveredby the thicker black matrix 54. Likewise, the data line 50 may also becovered by another portion of the black matrix 54. In addition, theregion 53 between the two color filters 62 or between the transparentregion 154 and the color filter 62 may be or may not be implemented withthe black matrix. In other words, the black matrix 54 may be selectivelyformed at the location according to the requirement without specificlimitation. In an embodiment, two adjacent data lines 50, a gate line 52and a black matrix may define a region as a pixel region 152. Inaddition, the transparent region 154 in an embodiment may be defined bytwo adjacent data line 50, the region 53, at which the black matrix 54may or may not be implemented, and a gate line (not shown in the FIG.3). On the other hand, the black matrix describe in this embodiment isused to describe the corresponding position to the TFT side substrate.The black matrix 54 could be disposed on the color filter substrate orTFT substrate, but not limited thereto. The above-mentioned descriptionof the black matrix 54 may also be applied to other embodiments underthe similar schematic diagrams, which will not be redundantly repeated.

To see the diffraction effect is reduced by increasing the pitch oftransparent region, the theoretic base is provided. FIG. 4 is a drawing,schematically illustrating a diffraction effect, according to anembodiment of the disclosure. Referring to FIG. 4, the diffractionmechanism are shown, corresponding to a smaller pitch “a” and a largerpitch “A” between two transparent regions. The diffraction effect 190with pitch “a” should satisfy a diffraction condition in optical theory:

a·sin θ=λ,

where θ is the diffraction angle and X is the wavelength. Thediffraction effect 192 with larger pitch “A” in optical theory for theright part in FIG. 4 is

A·sin θ′=λ.

To the given wavelength λ, the pitch “A” is larger than the pitch a,then the diffraction angle θ′ for the pitch “A” is reduced. This impliesthat the diffraction angle θ′ for the 1^(st) order diffraction pattern,causing blur effect, is more approaching to 0 degree, which is referringto the normal direction N. The blur effect causing by diffraction may bereduced.

The disclosure may increase the pitch, such as the larger pitch “A”,between the adjacent two transparent regions 154, 156.

FIG. 5 is a drawing, schematically illustrating the transparent regionin a pixel array of a transparent display device, according to anembodiment of the disclosure. Referring to FIG. 5, a further applicationin an embodiment that four sub-pixels 152 a, 152 b, 152 c, 152 d arearranged along the direction D1. In an embodiment, the four sub-pixels152 a, 152 b, 152 c, 152 d arranged along the direction D1 may form as apixel region 152.

As to sizes or the width along the direction D1, the transparent regions154 and 156 in sizes or shapes may be same or different. The pitch Abetween the transparent regions 154 and 156 is increased when foursub-pixels 152 a, 152 b, 152 c, 152 d are arranged together in anembodiment. However, the black matrix can be selectively arrangedaccording to the actual design, without limited to the specificconfiguration. The disclosure is not limited to the embodiments.

As to configuration in the embodiments, one of the transparent regions154, 156 has a first width w1 in maximum along the direction D1 and oneof the at least three sub-pixels 152 a, 152 b . . . has a second widthw2 in maximum along the direction D1. The first width w1 is differentfrom the second width w2. The second width w2 in an embodiment may referto the width of one sub-pixel 152 a, 152 b. However, the second width w2in an embodiment may refer to a width by averaging a distance betweentwo adjacent sides of the adjacent two transparent regions 154, 156along the direction D1 by the number of the sub-pixels 152 a, 152 b. . .disposed in this distance along the direction D1.

In an embodiment, as to the transparent display device, a ratio of thefirst width w1 to the second width w2 is greater than or equal to 0.01and less than 1. In another embodiment, a ratio of the first width w1 tothe second width w2 is greater than 1 and less than or equal to 200, butthe disclosure is limited to this ratio.

In an embodiment, as to the transparent display device, the transparentregion 154 and the transparent region 156 are same size or thetransparent region 156 is longer than the transparent region 154 alongthe direction D1.

In an embodiment, as to the transparent display device, the pixel region152 includes at least three sub-pixels, such as three sub-pixels 152 a,152 b, 152 c in FIG. 2 or four sub-pixels 152 a, 152 b, 152 c, 152 d inFIG. 5, or even more, without specific limitation. In some embodiment,it further comprises another transparent region (not shown in thefigure) disposed between the any two of the at least three sub-pixelsalong the direction (D1).

In an embodiment, as to the transparent display device, the transparentregions 154, 156 are a permanent transparent region or a transparentregion under switching control. The permanent transparent region in anembodiment may be transparent material. However, some materials may havethe non-transparent state but can be switched to transparent state undercontrol by apply a bias. In other words, the disclosure may form thetransparent region according to the actual design. In some embodiment,the transparent region may include or does not include the pixelelectrode. If the pixel electrode is included in the transparent region,it can be applied with an operation voltage to be normally white, whichis at the transparent state.

In an embodiment, as to the transparent display device, it may furthercomprise another transparent region disposed between the sub-pixels inthe at least two sub-pixels. FIG. 6 is a drawing, schematicallyillustrating the transparent region with another transparent region in apixel array of a transparent display device, according to an embodimentof the disclosure.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

Referring to FIG. 6, in an embodiment, the transparent display device inan embodiment may include a unit region 200. The unit region 200includes a first transparent region 202 and at least two sub-pixels 152a, 152 b arranged along the direction D1 adjacent to the firsttransparent region 202. The unit region 200 may optionally furthercomprise a second transparent region 204 disposed between the at leasttwo sub-pixels 152 a, 152 b. Thus, in an embodiment of FIG. 6, the unitregion 200 sequentially comprises a sub-pixel 152 a, a secondtransparent region 204, a sub-pixel 152 b and a first transparent region202 along the direction D1. The first transparent region 202 has a thirdwidth w3 in maximum along the direction D1. The second transparentregion 204 has a fourth width w4 in minimum along the direction D1. Thefourth width w4 of the second transparent region 204 is smaller than thethird width w3 of the first transparent region 202. In an embodiment, aratio R of the fourth width w4 of the second transparent region 204 tothe third width w3 of the first transparent region 202 is in a range of0<R≤0.5. In an embodiment, the unit region may refer to a minimum unit,which is repeated in the pixel array. In an embodiment, the at least twosub-pixels 152 a, 152 b has a width w′ in a maximum along the directionD1. A ratio of the third width w3 to the width w′ is greater than orequal to 0.01 and less than 1. In another embodiment, a ratio of thethird width w3 to the width w′ is greater than 1 and less than or equalto 200, but the disclosure is limited to this ratio. The width w′ in anembodiment may refer to a distance between two adjacent sides of thefirst transparent region 202 and the second transparent region 204 alongthe direction D1.

In an embodiment, the direction D1 is substantially parallel to theextending direction of data line. In another embodiment, the directionD1 is crossed to the extending direction of the gate line. Herein, thedirection D1 and the extending direction of the gate line are different.For example, the direction D1 may be perpendicular to the extendingdirection of the gate line or an angle (such as 75-90 degrees or 80-90degrees) is included between the direction D1 and the extendingdirection of the gate line, but not just limited thereto.

The diffraction effect from the second transparent region 204 withnarrow width may provide the additional diffraction effect, which mayreduce the interference between two larger first transparent regions202. As a result, the intensity of the diffraction pattern may bereduced to further reduce the blur effect. In addition, the pitch Adescribed as the embodiment of the FIG. 2 between two adjacent firsttransparent region 202 arranged along the direction D1 may increase. Thediffraction effect is reduced by increasing the pitch A of transparentregion.

FIG. 7 is a drawing, schematically illustrating a diffraction effect,according to an embodiment of the disclosure. Referring to FIG. 7, thediffraction effect 194 form the first transparent regions 202 is shown.The diffraction effect 198 form the first transparent regions 202 withthe second transparent region 204 is also shown. In optical behaviour,the beam passing the second transparent region 204 in narrow width mayproduce additional wave bottom in intensity to cause a subtractioneffect to the wave peak. Thus, the blur effect in the diffraction effect198 may be reduced in which the arrangement of the first transparentregion 202 and the second transparent region 204 is shown, for example,in FIG. 6.

The forgoing disclosure of embodiments is based on the drawing as anexample.

However, the disclosures in the other embodiments and drawings with thefeatures described above may also fall into the protection scope of theforgoing disclosure.

FIG. 8 is a drawing, schematically illustrating the first region and thepixel region are arranged alternately along the direction D1 and thedirection D2 in a pixel array of a transparent display device, accordingto an embodiment of the disclosure.

Referring to FIG. 8, another configuration on the transparent region andthe pixel region in an embodiment is further provided. A transparentdisplay device includes at least two first regions 160 and at least twopixel regions 162. Each of the at least two first regions 160 includesat least three transparent regions, such as three transparent regions inan embodiment. Each of the at least two pixel regions 162 includes atleast three sub-pixels such as three sub-pixels in an embodiment. The atleast two first regions 160 and the at least two pixel regions 162 arearranged alternately along the direction D1 and the direction D2. Thedirection D1 is different from the direction D2. In an embodiment, thefirst regions 160 and the pixel regions 162 along the direction D1 andthe second direction D2 are alternately and adjacently disposed. Thefirst regions 160 along the direction D1 and the second direction D2 arenot adjacently disposed. In an embodiment, a pixel region 162 isdisposed between adjacent two first regions 160 along the direction D1and the second direction D2. Likewise, a first region 160 is disposedbetween adjacent two pixel regions 162 along the direction D1 and thesecond direction D2.

In some embodiment, the width of the first regions 160 and the width ofthe pixel regions 162 along the direction D1 are equal. The width of theregions 160 and the width of the pixel regions 162 along the directionD2 are equal. The pixel region 162 in an embodiment forms a full pixel.The pixel region 162 may include other sub-pixel in other compensatingcolor depending on the actual design. In another embodiment, the atleast two pixel regions 162 comprises six sub-pixels, but not justlimited thereto. In some embodiment, transparent display device furthercomprises another transparent region (not shown in FIG. 8) which isdisposed between two of the at least three sub pixels along thedirection D1. The arrangement can refer to the FIG. 9 and the FIG. 9would further describe in the following. In addition, the pitch Adescribed as the embodiment of the FIG. 2 between two adjacenttransparent regions arranged along the direction D1 may increase. Thediffraction effect is reduced by increasing the pitch A of transparentregion.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

FIG. 9 is a drawing, schematically illustrating with another transparentregion in a pixel array of a transparent display device, according to anembodiment of the disclosure. Referring to FIG. 9, as a modificationfrom the structure in FIG. 6, in this embodiment of the disclosure mayalso include a unit region 300 which sequentially include a sub-pixel162 a, a second transparent region 204, a sub-pixel 162 b and a firsttransparent region 202 along the direction D1. Another unit region 300′may also sequentially with reverse direction to the unit region 300include a sub-pixel 162 a, a second transparent region 204, a sub-pixel162 b and a first transparent region 202. In an embodiment, the unitregion 300 and the unit region 300′ may be repeated by three torespectively form the first region 160 and the pixel region 162, but notlimited to. The embodiment in description is taking an example by usingthree unit regions 300 and the unit regions 300′ to form the arrangementas FIG. 9. In addition, the pitch A described as the embodiment of theFIG. 2 between two adjacent first transparent regions 202 arranged alongthe direction D1 may increase. The diffraction effect is reduced byincreasing the pitch A of transparent region.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

FIG. 10 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 9, according to an embodimentof the disclosure. In fabrication, the pixel structure, taking theconfiguration in FIG. 9 as an example, is shown with the data lines 50and the gate line 52. In an embodiment, the black matrix 54 may beadditionally formed over the gate line 52, thin film transistor and thedata line 50 but not limit the disclosure.

In an embodiment, just a portion of the black matrix 54 is shown tooptionally cover the gate lines 52. To the pixel structure asfabricated, the data line 50 is also included. Likewise, the data line50 may also be covered by another portion of the black matrix 54. Inother words, the black matrix 54 may be optionally formed at anylocation according to the requirement without specific limitation.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

FIG. 11A and FIG. 11B are drawings, schematically illustrating thetransparent region with another transparent region in a pixel array of atransparent display device, according to an embodiment of thedisclosure. Referring to FIG. 11A, the width of the first transparentregion in the direction D2 may be increased by including two sub-pixelsalong the direction D2. Generally, in an embodiment, a transparentdisplay device includes a unit region 170 including a first transparentregion 172, a second transparent region 176, a sub-pixel 174 a and asub-pixel 174 b. The sub-pixels 174 a and the sub-pixel 174 b arrangedalong the direction D2. In another embodiment, the unit region 170 mayfurther comprises at least two sub-pixels 174 a, 174 b. The firstdirection D1 is crossing the direction D2. The first transparent region172 is adjacent to the sub-pixels 174 a and the sub-pixel 174 b alongthe direction D1. The second transparent region 176 is extending alongthe direction D1 between the two sub-pixels 174 a, 174 b. The firsttransparent region 172 has a fifth width w5 in maximum along thedirection D2, the second transparent region 176 has a sixth width w6 inminimum along the direction D2, and the fifth width w5 is greater thanthe sixth width w6. In an embodiment, the direction D2 is substantiallyparallel to the extending direction of gate line. In another embodiment,the direction D2 is crossed to the extending direction of the data line.Herein, the direction D2 and the extending direction of the data lineare different. For example, the direction D2 may be perpendicular to theextending direction of the data line or an angle (such as 75-90 degreesor 80-90 degrees) is included between the direction D2 and the extendingdirection of the data line, but not just limited thereto.

In this configuration, the pitch A described as the embodiment of theFIG. 2 between adjacent two first transparent regions 172 along thedirection D2 is increased. The diffraction effect is reduced byincreasing the pitch A between adjacent transparent regions.

Referring to FIG. 11B, the structure is similar to the structure in FIG.11A but a periphery of the color filter with respect to the sub-pixels174 a, 174 b in actual fabrication may extend out, not formed bystraight sides. The sixth width w6 is then reduced. In a furthersituation, the color filters of the two sub-pixels 174 a, 174 b may evencontact to each other, in which the sixth width w6 may be approaching oreven equal to zero. In this configuration, the pitch A described as theembodiment of the FIG. 2 between adjacent two first transparent regions172 along the direction D2 is increased.

The forgoing disclosure of embodiments is based on the drawing as anexample.

However, the disclosures in the other embodiments and drawings with thefeatures described above may also fall into the protection scope of theforgoing disclosure.

FIG. 12 is a drawing, schematically illustrating the pixel structurecorresponding to the pixel array in FIG. 11A and FIG. 11B, according toan embodiment of the disclosure. Referring to FIG. 12, in an embodiment,the pixel structure based on the configuration in FIG. 11A and FIG. 11Bis involving two adjacent data lines 50 a, 50 b, which are disposedadjacent to each other but belonging to two unit regions 170 along thedirection D2. In other words, the two adjacent data lines 50 a, 50 bdispose between the adjacent two of the unit region. In this situation,the adjacent two data lines 50 a, 50 b form a data line group, whichoccupies a relatively wider data line width, as seen in FIG. 11A andFIG. 11B.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

In a further modification on FIG. 11A, FIG. 11B and FIG. 12, theadjacent two data lines 50 a, 50 b in FIG. 12 may be made by differentmetal layers. In some embodiments, the adjacent two data lines 50 a, 50b may have at least an overlapping portion. FIG. 13 is a drawing,schematically illustrating the pixel structure corresponding to thepixel array in FIG. 11A and FIG. 11B, according to an embodiment of thedisclosure.

Referring to FIG. 13 with reference to FIG. 11A, FIG. 11B and FIG. 12,the two data lines 50 a and 50 b in FIG. 12 respectively belonging tothe adjacent two unit regions 170 along the direction D2 may be arrangedto be overlapped as a data line group. In some embodiment, the two datalines 50 a and 50 b have at least an overlapped portion, for example, inthe top view of FIG. 13. In another embodiment, the two data lines 50 aand 50 b have a width about equal to a width of a single data line.

The forgoing disclosure of embodiments is based on the drawing as anexample.

However, the disclosures in the other embodiments and drawings with thefeatures described above may also fall into the protection scope of theforgoing disclosure.

In an embodiment, the pixel structure in other design may include aprimary pixel and a second pixel together controlled by two data lines(2D) with one gate line (1G), called 2D1G structure, or controlled bytwo gate lines (2G) as a master gate line and a slave gate line and onedata line (1D), called 2G1D structure. The disclosure may be applied tothese applications, in which the gate lines or the two data lines may bestacked up or overlapped, as the examples.

In an embodiment, taking the 2G1D structure for example, two adjacentgate line (not shown), which are disposed adjacent to each other butbelonging to two unit regions along the direction D1 (for example, theextending direction of data line). In other words, the two adjacent gatelines dispose between the adjacent two of the unit region.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

FIG. 14 is a drawing, schematically illustrating the transparent regionwith another transparent region in a pixel array of a transparentdisplay device, according to an embodiment of the disclosure. Referringto FIG. 14, the configuration for a unit region 180 has includedmechanism in FIG. 2 to increase the pitch A of the two of firsttransparent regions 182 in the direction D1 and the features in FIG. 11Aand FIG. 11B to increase the pitch A of the two of first transparentregions 182 in the direction D2. The unit region 180 includes a firsttransparent region 182, a second transparent region 184 serving asanother transparent region and at least two sub-pixels (for example,four sub-pixels), but the disclosure is not limited to four sub-pixels.In this embodiment, referring to the FIG. 14, a portion of the at leasttwo sub-pixels is arranged along the direction D1, and a portion of theat least two sub-pixels is arranged along another direction D2. Aportion of the second transparent region 184 is disposed between two ofthe portion of the at least two sub-pixels arranged along anotherdirection D2. In other words, the second transparent region 184 is amongthe four sub-pixels shown as FIG. 14. In embodiments, several widths asindicated by w3, w4, w5 and w6 are further described. The width w3 isreferring to the width of the first transparent regions 182 along thedirection D1. The width w4 is referring to the width of a portion of thesecond transparent region 184 along the direction D1 and betweenadjacent two sub-pixels along the direction D1, in which the portion ofthe second transparent region 184 is extending along the direction D2.The width w4 is smaller the width w3. Further, the width w5 is referringto the width of the first transparent regions 182 along the directionD2. The width w6 is referring to the width of a portion of the secondtransparent region 184 along the direction D2 and between adjacent twosub-pixels along the direction D2, in which the portion of the secondtransparent region 184 is extending along the direction D1. The width w6is smaller the width w5.

The diffraction effect of the first transparent region 182 is relatingto the mechanism as described in FIG. 4, in which the pitches of two ofthe first transparent regions 184 in the direction D1 and the directionD2 are all increased. The diffraction effect of the second transparentregion 184 is relating to the mechanism as described in FIG. 7. A blackmatrix 188 in an embodiment may be additionally implemented between thesub-pixels along the direction D2. However, the use of the black matrix188 is an option without limiting the disclosure.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

In a further embodiment, a unit region 180′ may also be configured,including a first transparent region 182′, a second transparent region184′ and two sub-pixels.

FIG. 15 is a drawing, schematically illustrating the transparent regionwith another transparent region in a pixel array of a transparentdisplay device, according to a variant embodiment of the FIG. 14 of thedisclosure. Referring to FIG. 15, the transparent display is configuredto also have the unit region 180 and the unit region 180′ as describedin FIG. 14. The size relations for the widths w3, w4, w4, w5 are notrepeatedly described here. However, the first transparent region 182 isalternately disposed with four sub-pixels along the direction D1 and thedirection D2.

As also noted, the black matrix 188 in FIG. 14 and FIG. 15 may beoptionally implemented to cover the region as intended without specificlimitation.

The forgoing disclosure of embodiments is based on the drawing as anexample. However, the disclosures in the other embodiments and drawingswith the features described above may also fall into the protectionscope of the forgoing disclosure.

The disclosure provides the transparent display device based on at leastone of the factors including the pitch A of the two of the firsttransparent regions 182 in direction D1, the pitch A of the two of thefirst transparent regions 182 in direction D2, the second transparentregion 184 in direction D1, the second transparent region 184 indirection D2, and overlapping of the data lines, the diffraction effectof the background scene behind the transparent display device may bereduced.

The pitch described in the disclosure may include a sum of widths of atleast two sub-pixels along the sub-pixels arrangement direction.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims and their equivalents.

What is claimed is:
 1. A transparent display device, comprising: a firstpixel electrode and a second pixel electrode disposed adjacent to thefirst pixel electrode; a first transparent region disposed adjacent tothe first pixel electrode; and at least two metal lines, wherein the atleast two metal lines are disposed between the first pixel electrode andthe second pixel electrode.
 2. The transparent display device accordingto claim 1, wherein the at least two metal line are data lines.
 3. Thetransparent display device according to claim 1, further comprising: asecond transparent region disposed adjacent to the second pixelelectrode.
 4. The transparent display device according to claim 3,wherein the at least two metal line are disposed between the firsttransparent region and the second transparent region.
 5. The transparentdisplay device according to claim 3, wherein the first pixel electrodeand the second pixel electrode are disposed between the firsttransparent region and the second transparent region.
 6. The transparentdisplay device according to claim 3, further comprising: a third pixelelectrode, wherein the first transparent region and the secondtransparent region are arranged along a first direction, the first pixelelectrode and the second pixel electrode are arranged along the firstdirection, the second pixel electrode and the third pixel electrode arearranged along a second direction, and the first direction and thesecond direction are perpendicular.
 7. The transparent display deviceaccording to claim 6, wherein the first pixel electrode and the thirdpixel electrode are located on the same side of the at least two metallines.